Deburring device

ABSTRACT

In the deburring device, a peening tool for deburring cut edges of sheet metal or other sheet material comprises a roller having a continuous peripheral groove and supported for free rotation between two plates. The plates and roller are forcefully vibrated as the roller, at its said groove, is engaged against and rolled along an edge to be deburred, thereby smoothing said edge.

United States Patent Neilsen Feb. 18, 1975 [5 DEBURRING DEVICE 3.587.275 6/l97l Brennan 72/199 76 I t H'ld L. N l. 2 J St., nven Or ggg j gg Primary Examiner-M1lt0n S. Mehr Attorney, Agent, or Firm-Robert Henderson [22] Filed: Apr. 29, 1974 [21] App]. No.1 465,275 [57] ABSTRACT In the deburring device. a peening tool for dehurring 52 11.5. C1. 72/211, 72/199 Cut edges Of Sheet metal or other 511w material @0111- 51 Int. Cl 821d 19/04 prises 11 roller having Continuous Peripheral groove [58] Field of Search 1. 72/211, 194, 462; 81/3 and Supported for free rotation between two P The plates and roller are forcefully vibrated as the rol- [56] References Cited ler, at its said groove, is engaged against and rolled UNITED STATES PATENTS along an edge to be deburred, thereby smoothing said 1 2.8()3,l56 8/l957 Abruhumson 7Z/ll u ge 3.318.129 5/1967 Gross 72/199 5 Claims, 5 Drawing Figures I 1 r I i l DEBURRING DEVICE BACKGROUND OF THE INVENTION The concept of holding a peening tool against and moving it along an edge to be deburred and, mean while, forcefully, vibrating said tool, is disclosed in my U.S. Pat. No. 3,707,087, dated Dec. 26, 1972.

While the device of said patent has proven to be effective for its intended purpose, it has been found that the jawed tool disclosed therein sometimes has a tendency to dig slightly into the metals edge and thereby oppose desired easy sliding of the device along said edge. I find that the use of a grooved roller according to the present invention as an edge engaging part of a peening tool, enables the device to be moved easily along said edge under improved manual control.

THE PRINCIPAL OBJECT OF THIS INVENTION The principal object of this invention is to provide a deburring device which may operate more easily, and more effectively and under improved manual control than prior deburring devices.

BRIEF DESCRIPTION OF THE DRAWING In the accompanying drawing:

FIG. 1 is a perspective view of a deburring device according to this invention, shown in positioh upon a sheet metal edge being deburred.

FIG. 2 is a side view of the device, portions thereof being shown in central axial section.

FIG. 3 is a slightly enlarged, elevational view of the devices peening tool as seen in the direction of arrow A in FIG. 2.

FIG. 4 is a perspective view of said peening tool.

FIG. 5 is a plan view of the bottom of a rotary hammer in the device as seen at the plane of the line 55 of FIG. 2.

DETAILED DESCRIPTION OF THE INVENTION The deburring device of the present invention, except for an improved peening tool, is fully disclosed, with certain possible variations, in my mentioned patent to which reference may be had if desired.

A piece B of metal to be deburred may be a straight piece or its edge 81 to be deburred may be curved or angular as indicated in FIG. 1. Irrespective of its shape, however, it may easily be deburred with the use of my improved device of the present invention.

The general structure of the deburring device of this invention comprises a rotary hammer element which is suitably borne within a barrel-shaped housing 12, in needle bearings 14, enabling the hammer element to be rapidly rotated in the housing by a motor 16, operative through a stem 18 integral with the hammer element 10.

The hammer element 10 is restrained against material axial movement by suitable thrust bearings, and a handle 20, extending through the housing 12, opposes rotation of the latter against the torque of the motor 16 and aids the user in manually guiding the device along an edge being deburred, with an improved peening tool of this invention in deburring relationship to said edge, all as hereinafter explained.

The peening tool includes plate means comprising a pair of initially flat plates 22 which are medially bent as best illustrated in FIG. 3 so that while upper, tongue portions 24 may remain intimately in face to face association, lower yoke portions 26 diverge from the tongue portions to provide therebetween a space which accommodates a peening roller 28 therein.

The imtimately associated tongue portions 24 of the plates 22 are slideably disposed within a slot 30 formed across the bottom of the housing 12 and are retained therein by the handle 20, an end portion of which extends through said housing and also through oblong openings 32 in the tongue portions of the plates. A cotter pin 34 holds the handle 20 against dislodgement from the housing 12.

The larger dimensions of the openings 32 extend axially of the hammer elements stem 18, thereby permitting limited axial sliding of the plates 22 in the slot 30. The mentioned axial sliding of the plates 22 is very limited, being in the nature of a vibratory action caused by coaction between the hammer element 10, a pair of impacttransmitting balls 36, and upper edges 38 of the plates 22.

The generally flat bottom face of the rotary hammer element 10 is formed with a concentric, circular series of equally spaced indentations 40 (FIG. 5). The balls 36, disposed slideably within recesses 42 in atransverse wall 44 of the housing 12, in alignment with said indentations, may move into and out of the indentations as the hammer element is rapidly rotated by the motor 16, thereby imparting the mentioned vibratory action to the plates 22 and the peening roller 28.

The peening roller 28 is formed with a continuous, peripheral groove 46 and is suitable supported by the plates 22 to enable it to turn freely about its axis. As illustrated, the peening roller has integral trunnions 48 which extend rotatably within bearing holes 50 in the yoke portions 26 of the plates 22.

OPERATION OF THE DEVICE OF THIS INVENTION In use of the illustrated device, the user holds the motor 16 in one hand and grasps the handle 20 with his other hand. With motor 16 running, he holds the device so that, as shown in FIG. 1, the groove 46 of the peening roller engages and is rolled along the edge B1 of metal piece B which is to be deburred. The device, meanwhile, is pressed quite forcibly against said edge to maintain the indicated vibratory action of the rollers groove 46 with respect to said edge. Such vibratory action occurs through interaction between the plates 22 and roller 28 on the one hand and between said plates and the balls 36 on the other hand so that, as the edge B1 is traversed by said roller, said edge is rendered smooth and substantially free of objectionable burrs.

It will be realized that the action of the roller 28 along an edge being deburred is much smoother than movement of a non-rollered tool along such an edge, thereby permitting the device to be employed with substantially improved facility.

Although the rollers groove 46 is illustrated as of approximately semi-circular shape at a radial section thereof, that shape may be varied in different interchangeable rollers so that the user has a choice of rollers to be used for deburring edges of different metals or other sheet materials and on sheet materials of different thicknesses.

Changing of rollers is easily effected by first removing the cotter pin 34 and handle 20 to enable the plates 22 and roller 28 to be separated from the remainder of the device. Then the parts may be reassembled with the desired substitute roller.

I claim:

1. A deburring device for smoothing an edge of sheet metal and the like, comprising a rotary hammer having a circular, interrupted working surface, a tool including a peening roller formed with a continuous peripheral groove extending therearound, roller supporting means holding said roller in operational relationship to said hammer, and impact-transmitting means coacting between the hammers said working surface and said rol ler supporting means to reciprocate the latter and to forcibly impel said roller, in its said groove, into intermittent peening engagement with said edge.

2. A deburring device according to claim 1, said hammer having a flat, radial surface within which said working surface is provided, said working surface being coaxial with said hammer and formed with a circular series of equidistantly spaced frusto-spherical indentations; and said impact-transmitting means comprising plural balls.

3. A peening tool for a deburring device, said tool comprising a roller formed with a continuous peripheral groove extending therearound, and plate means formed with a bifurcated lower end portion within which said roller is rotatably disposed; said plate means having an impactreceptive portion at its upper end.

4. A peening tool according to claim 3, said plate means comprising a pair of plates having flat upper end portions in intimate interengagement, and having divergent lower end portions between which said roller is disposed.

5. A peening tool according to claim 4, in combination with a housing of a related deburring device formed with a slot therein adapted to slideably receive the plates said upper end portions and to hold said upper end portions in intimate interengagement. 

1. A deburring device for smoothing an edge of sheet metal and the like, comprising a rotary hammer having a circular, interrupted working surface, a tool including a peening roller formed with a continuous peripheral groove extending therearound, roller supporting means holding said roller in operational relationship to said hammer, and impact-transmitting means coacting between the hammer''s said working surface and said roller supporting means to reciprocate the latter and to forcibly impel said roller, in its said groove, into intermittent peening engagement with said edge.
 2. A deburring device according to claim 1, said hammer having a flat, radial surface within which said working surface is provided, said working surface being coaxial with said hammer and formed with a circular series of equidistantly spaced frusto-spherical indentations; and said impact-transmitting means comprising plural balls.
 3. A peening tool for a deburring device, said tool comprising a roller formed with a continuous peripheral groove extending therearound, and plate means formed with a bifurcated lower end portion within which said roller is rotatably disposed; said plate means having an impactreceptive portion at its upper end.
 4. A peening tool according to claim 3, said plate means comprising a pair of plates having flat upper end portions in intimate interengagement, and having divergent lower end portions between which said roller is disposed.
 5. A peening tool according to claim 4, in combination with a housing of a related deburring device formed with a slot therein adapted to slideably receive the plate''s said upper end portions and to hold said upper end portions in intimate interengagement. 